| Observation of the Crab Nebula with LHAASO-KM2A-a performance study | |
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| 发表期刊 | CHINESE PHYSICS C
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| 2021-02-01 | |
| 卷号 | 45期号:2页码:13 |
| DOI | 10.1088/1674-1137/abd01b |
| 产权排序 | 第25完成单位 |
| 收录类别 | SCI |
| 关键词 | gamma-ray Crab Nebula extensive air showers cosmic rays |
| 摘要 | A sub-array of the Large High Altitude Air Shower Observatory (LHAASO), KM2A is mainly designed to observe a large fraction of the northern sky to hunt for gamma-ray sources at energies above 10 TeV. Even though the detector construction is still underway, half of the KM2A array has been operating stably since the end of 2019. In this paper, we present the KM2A data analysis pipeline and the first observation of the Crab Nebula, a standard candle in very high energy gamma-ray astronomy. We detect.-ray signals from the Crab Nebula in both energy ranges of 10 100 TeV and 100 TeV with high significance, by analyzing the KM2A data of 136 live days between December 2019 and May 2020. With the observations, we test the detector performance, including angular resolution, pointing accuracy and cosmic-ray background rejection power. The energy spectrum of the Crab Nebula in the energy range 10-250 TeV fits well with a single power-law function dN/dE = (1.13 +/- 0.05(stat)+/- 0.08(sys))x10(-14) . (E/20 TeV)(-3.09 +/- 0.06stat +/- 0.02sys) cm(-2) s(-1) TeV. It is consistent with previous measurements by other experiments. This opens a new window of gamma-ray astronomy above 0.1 PeV through which new ultrahigh-energy gamma-ray phenomena, such as cosmic PeVatrons, might be discovered. |
| 资助项目 | Chengdu Management Committee of Tianfu New Area ; National Key R&D program of China under the grants by NSFC, by NSFSPC ; Thailand Science Research and Innovation [RTA6280002] |
| 项目资助者 | Chengdu Management Committee of Tianfu New Area ; National Key R&D program of China under the grants by NSFC, by NSFSPC ; Thailand Science Research and Innovation [RTA6280002] |
| 语种 | 英语 |
| 学科领域 | 天文学 ; 天体物理学 ; 高能天体物理学 |
| 文章类型 | Article |
| 出版者 | IOP PUBLISHING LTD |
| 出版地 | TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND |
| ISSN | 1674-1137 |
| URL | 查看原文 |
| WOS记录号 | WOS:000614054500001 |
| WOS研究方向 | Physics |
| WOS类目 | Physics, Nuclear ; Physics, Particles & Fields |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.ynao.ac.cn/handle/114a53/24130 |
| 专题 | 南方基地 |
| 通讯作者 | Aharonian, F. |
| 作者单位 | 1.Key Laboratory of Particle Astrophyics & Experimental Physics Division & Computing Center, Institute of High Energy Physics, Chinese Academy of Sciences, 100049 Beijing, China 2.University of Chinese Academy of Sciences, 100049 Beijing, China 3.TIANFU Cosmic Ray Research Center, Chengdu, Sichuan, China 4.State Key Laboratory of Particle Detection and Electronics, China 5.University of Science and Technology of China, 230026 Hefei, Anhui, China 6.Department of Engineering Physics, Tsinghua University, 100084 Beijing, China 7.National Astronomical Observatories, Chinese Academy of Sciences, 100101 Beijing, China 8.National Space Science Center, Chinese Academy of Sciences, 100190 Beijing, China 9.School of Physics, Peking University, 100871 Beijing, China 10.Center for Astrophysics, Guangzhou University, 510006 Guangzhou, Guangdong, China 11.School of Physics and Astronomy & School of Physics (Guangzhou), Sun Yat-sen University, 519000 Zhuhai, Guangdong, China 12.School of Physical Science and Technology, Guangxi University, 530004 Nanning, Guangxi, China 13.Hebei Normal University, 050024 Shijiazhuang, Hebei, China 14.School of Physics and Microelectronics, Zhengzhou University, 450001 Zhengzhou, Henan, China 15.School of Astronomy and Space Science, Nanjing University, 210023 Nanjing, Jiangsu, China 16.Key Laboratory of Dark Matter and Space Astronomy, Purple Mountain Observatory, Chinese Academy of Sciences, 210023 Nanjing, Jiangsu, China 17.Institute of Frontier and Interdisciplinary Science, Shandong University, 266237 Qingdao, Shandong, China 18.Key Laboratory for Research in Galaxies and Cosmology, Shanghai Astronomical Observatory, Chinese Academy of Sciences, 200030 Shanghai, China 19.Tsung-Dao Lee Institute & School of Physics and Astronomy, Shanghai Jiao Tong University, 200240 Shanghai, China 20.School of Physical Science and Technology & School of Information Science and Technology, Southwest Jiaotong University, 610031 Chengdu, Sichuan, China 21.College of Physics, Sichuan University, 610065 Chengdu, Sichuan, China 22.Key Laboratory of Cosmic Rays (Tibet University), Ministry of Education, 850000 Lhasa, Tibet, China 23.School of Physics and Technology, Wuhan University, 430072 Wuhan, Hubei, China 24.School of Physics and Astronomy, Yunnan University, 650091 Kunming, Yunnan, China 25.Yunnan Observatories, Chinese Academy of Sciences, 650216 Kunming, Yunnan, China 26.Dublin Institute for Advanced Studies, 31 Fitzwilliam Place, 2 Dublin, Ireland 27.Max-Planck-Institut for Nuclear Physics, P.O. Box 103980, 69029 Heidelberg, Germany 28.Dipartimento di Fisica dell'Università di Napoli 29.Institute for Nuclear Research of Russian Academy of Sciences, 117312 Moscow, Russia 30.Moscow Institute of Physics and Technology, 141700 Moscow, Russia 31.Département de Physique Nucléaire et Corpusculaire, Faculté de Sciences, Université de Genève, 24 Quai Ernest Ansermet, 1211 Geneva, Switzerland 32.Department of Physics, Faculty of Science, Mahidol University, 10400 Bangkok, Thailand |
| 推荐引用方式 GB/T 7714 | Aharonian, F.,An, Q.,Axikegu,et al. Observation of the Crab Nebula with LHAASO-KM2A-a performance study[J]. CHINESE PHYSICS C,2021,45(2):13. |
| APA | Aharonian, F..,An, Q..,Axikegu.,Bai, L. X..,Bai, Y. X..,...&Zuo, X..(2021).Observation of the Crab Nebula with LHAASO-KM2A-a performance study.CHINESE PHYSICS C,45(2),13. |
| MLA | Aharonian, F.,et al."Observation of the Crab Nebula with LHAASO-KM2A-a performance study".CHINESE PHYSICS C 45.2(2021):13. |
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